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The paper is devoted to the approach development and investigation of the policing based Traffic Engineering Fast ReRoute in SD-WAN architectures. The paper proposes a mathematical model of Fast ReRoute with load balancing based on the principles of Traffic Engineering (TE) and differentiated traffic policing in communication networks. The basis of the model is the conditions for the implementation of multipath routing together with the modified conditions for flow conservation, which take into account the priority traffic policing on the network edge in case of its probable overload. On the one hand, such an overload is caused by the increase in the load. On the other hand, it is caused by the implementation of protection schemes for network elements and its bandwidth in the course of fast rerouting. The advantage of the proposed solution is also the formulation of the Traffic Engineering Fast ReRoute …